In an effort to boost security, Microsoft added a few new features to your account. You can now see recent login activity, and recovery codes are available if you get locked out of an account with two factor authentication enabled.

The login activity page can now show you where your account has been accessed from. You can easily report it if you were not the one attempting to log in from that location. The recovery codes can be generated before you get locked out of your account, and should be stored somewhere safe.